If you were using Syndeia 3.4 in Local Mode (without Syndeia Cloud 3.4) and want to upgrade to Syndeia 3.5 6 in Local Mode, then you do not need to take any upgrade actions except the following.
Syndeia 3.5 6 uses the 3.5
sub-folder under the .syndeia
folder in your user home directory. This is to allow users to operate multiple versions of Syndeia plugins, installed with different versions of MagicDraw, on the same computer.
...